getnameinfo man page
"getnameinfo" — command-line tool to "getnameinfo(3)" resolver
getnameinfo [options...] address port
This tool provides a convenient command-line wrapper around the
getnameinfo(3) resolver function. It will perform a single reverse lookup to convert an address and port number into its host and service names. This is mainly useful when debugging names resolution problems, because it allows inspection of the
getnameinfo(3) behaviour itself, outside of any real program that is trying to use it.
- --address, -A ADDR
Numerical form of address to look up. If not supplied, will use the first positional argument.
- --port, -P PORT
Port number to look up. If not supplied, will use the second positional argument.
"NI_DGRAM"flag; looks up a
"SOCK_DGRAM"(udp) port allocation rather than
Display a help summary and exit
Paul Evans <email@example.com>